The axial angles in triclinic crystal system are

In a triclinic crystal system

The axial angles in ......... crystal system are alpha ne beta ne gamma ne 90^(@) .

Consider the following statements, I. Possibe variations for a cubic crystal system is primitive only II. The axial angles of a hexagonal crystal system are alpha=beta=90^@ " and " gamma = 120^@ . Which of the above statements(s) is / are true ?

Basic crystal systems known are:

Seven Crystal Systems